Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Chun -Ching Chien and Fu -Chung Chang and Shaw -Chii Wu,Study of colour-developing factors in spectrophotometric determination of cyanide by the pyridine-barbituric acid method,Mikrochimica Acta,0026-3672,Springer Science and Business Media LLC,1980-01,74,1-2,9-16,https://cir.nii.ac.jp/crid/1360861293151503232,https://doi.org/10.1007/bf01196481